Highlight • Lake
Hiking
5.0
(5)
Lago Bonnel, also known as Lac de Bonnel, is a serene alpine lake nestled at an elevation of 1796 meters in Italy's picturesque Valle d'Aosta region. This small, high-altitude lake is a true natural gem, situated within the municipality of Fontainemore in the scenic Lys Valley, upstream from the locality of Plan-Coumarial. It lies on the northern slope of Mont Mars, surrounded by sparse larch trees and rocky terrain, and is a significant feature of the Mont Mars Natural Reserve.
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Nearby routes
Best routes near Lago Bonnel

4.6
(43)
256
hikers
14.8km
06:47
1,020m
1,020m
Hard hike. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

2
hikers
7.07km
03:19
450m
450m
Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
Details
Informations
Elevation 1,680 m
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Tuesday 27 October
11°C
5°C
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Additional weather tips
Max wind speed: 1.0 km/h
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The hike to Lago Bonnel is considered moderate. It involves an ascent of approximately 516 meters (about 1,693 feet) from the starting point in Plan-Coumarial. The trail initially follows a carriage road before transitioning to a dedicated path to the lake. Hikers should be prepared for a steady climb.
On average, the walking time to reach Lago Bonnel is about 1 hour and 50 minutes from the equipped parking area in Plan-Coumarial. This estimate is for the ascent only, so plan for additional time for the return journey and enjoying the lake.
Yes, the hike to Lago Bonnel typically begins from an equipped parking area located in Plan-Coumarial. It is advisable to arrive early, especially during peak season, as parking spaces can fill up quickly.
Lago Bonnel can be suitable for families with older children who are accustomed to hiking. The trail involves a moderate ascent and is not stroller-friendly. Younger children or those less experienced with mountain trails might find the 516-meter elevation gain challenging. Always assess your family's fitness level before embarking on the hike.
As Lago Bonnel is located within the Mont Mars Natural Reserve, dogs are generally permitted on trails but must be kept on a leash to protect local wildlife and ensure the safety and comfort of other hikers. Always clean up after your pet.
No, Lago Bonnel is not accessible for wheelchair users or strollers. The path involves a carriage road followed by a dedicated trail with a significant elevation gain, making it unsuitable for wheeled access.
Visiting Lago Bonnel during winter presents significant challenges. The trails will likely be covered in snow and ice, requiring specialized equipment such as snowshoes or crampons. Conditions can be harsh, with colder temperatures and shorter daylight hours. It is recommended only for experienced winter hikers with appropriate gear and knowledge of avalanche safety.
Lago Bonnel is situated in a natural reserve, so there are no direct amenities like cafes, restaurants, or accommodation right at the lake. Visitors should plan to bring their own food and drinks. The nearest facilities would be found in the surrounding villages, such as Fontainemore or Plan-Coumarial, which may offer limited options depending on the season.
While there are no explicit prohibitions against swimming, Lago Bonnel is an alpine lake with very cold water, even in summer. It is also part of the Mont Mars Natural Reserve, where preserving the natural environment is paramount. Visitors should exercise caution and respect the natural ecosystem if considering a dip.
As part of the Mont Mars Natural Reserve, Lago Bonnel is home to various alpine wildlife. Hikers might spot chamois, ibex, marmots, and a variety of bird species. Observing wildlife from a distance and not disturbing their natural habitat is important.
Yes, the Mont Mars Natural Reserve offers numerous hiking opportunities. The trail to Lago Bonnel itself passes by Lago Vargno, which can be a point of interest. Many other routes in the reserve lead to different alpine lakes, peaks, and panoramic viewpoints, allowing for extended exploration of the Lys Valley.
Weather conditions at Lago Bonnel, being an alpine lake at 1796 meters, can change rapidly and be unpredictable. Even in summer, temperatures can drop, and sudden rain or thunderstorms are possible. Hikers should always carry layers of clothing, including waterproof and windproof gear, and be prepared for cooler temperatures than in the valley. Checking the local mountain weather forecast before your visit is highly recommended.